Observation 104534: Amanita bisporigera G.F. Atk.
When: 2012-08-09
Herbarium specimen reported

Notes: Fruiting under Oak (some Maple also present nearby). Initially I thought Amanita virosa, but spores are too small and caps are not pure white. Initially a pleasant strong sweet smell, but becoming overpowering after a while. 5% KOH on cap gives yellow reaction and I can only find 2-spored basidia. See attached photomicrographs.

Spores globose to subglobose, amyloid in Melzer’s and (7.1-8.5) x (5.3-7.4) microns with an average Q of 1.15

Proposed Names

-14% (2)
Used references
Based on microscopic features
81% (1)
Recognized by sight: volval limb on bulb NOT upstanding and NOT somewhat distant from stem
Based on microscopic features: 2-spored basidia dominating in early mushroom season
Based on chemical features: yellow cap reaction

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thanks Rod!
By: Linas Kudzma (baravykas)
2012-08-10 16:00:15 CDT (-0400)

Created: 2012-08-09 14:59:49 CDT (-0400)
Last modified: 2012-08-09 20:22:23 CDT (-0400)
Viewed: 158 times, last viewed: 2017-06-13 12:09:52 CDT (-0400)
Show Log